I dreamed of flying a kite and then cutting the thread myself.

Kite can represent yourself, or it can refer to people you "control", including your subordinates or children (because you don't know your age, if you are younger, you will probably refer to yourself).

The kite doesn't fly high, but you hold it firmly in your hand. The tight thread means that there is a lot of pressure and trouble in my heart.

Finally, I figured it out, cut the thread and let it go. This shows that the dreamer himself may wish to be as free as a kite.

The landlord's dream can also be solved in educating children and managing subordinates.

Specific analysis of specific problems, I'll stop here first.